CN110355173B - Self-adaptive variable air volume ventilation cabinet - Google Patents
Self-adaptive variable air volume ventilation cabinet Download PDFInfo
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- CN110355173B CN110355173B CN201910582736.7A CN201910582736A CN110355173B CN 110355173 B CN110355173 B CN 110355173B CN 201910582736 A CN201910582736 A CN 201910582736A CN 110355173 B CN110355173 B CN 110355173B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/42—Basic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
- B08B15/023—Fume cabinets or cupboards, e.g. for laboratories
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- Environmental & Geological Engineering (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a self-adaptive variable air volume ventilation cabinet, which belongs to the technical field of special test equipment and comprises a collecting box, a test box and an exhaust pipe, wherein a water outlet is formed in the position, close to the test box, of the collecting box; the alkaline waste liquid tank is connected with a first exhaust pipe; the acid waste liquid tank is connected with a second exhaust pipe; the invention has the advantages that the waste liquid can be automatically utilized for neutralization treatment, the solution used in subsequent treatment is reduced, and the work of experimenters is saved.
Description
Technical Field
The invention relates to the technical field of special test equipment, in particular to a self-adaptive variable air volume fume hood.
Background
The prior cabinet type exhaust hood is commonly called as a fume hood and is similar to a closed hood. The small parts spray-painting cabinet and the chemical laboratory fume hood are typical structures of cabinet type exhaust hoods. A large-scale chamber type ventilation cabinet has a completely opened side surface, and an operator works in the cabinet and is mainly used for large-scale paint spraying, powder bagging and the like. The working opening of the fume hood has great influence on the air distribution in the hood, and the air distribution directly influences the working effect of the cabinet type exhaust hood.
The prior art can refer to the Chinese utility model patent with the publication number of CN203791316U, which discloses a self-adaptive variable air volume fume hood, relates to the field of special equipment in laboratories, and realizes the variable air volume requirement of the fume hood in laboratories, so as to protect the health and safety of experimenters and effectively save energy consumption; the method comprises the following steps: the air conditioner comprises a cabinet body, a window on the front surface of the cabinet body and an air volume changing system connected with the cabinet body; wherein, variable air volume system includes: the air volume variable valve comprises a variable air volume controller integrated on the cabinet body, a door height sensor, a door position switch, an air volume detection sensor and an air valve actuator which are respectively electrically connected with the variable air volume controller, and further comprises a variable air volume valve electrically connected with the air valve actuator.
The above prior art solutions have the following drawbacks: the fume chamber can produce waste gas and waste liquid at the test process, and waste gas and waste liquid all discharge respectively and retrieve usually, then handle respectively, but waste gas and waste liquid generally all have the acid-base nature, all need carry out neutralization when handling, and the acid-base solution volume that uses is great in the neutralization treatment process, and still need the tester to operate, and is more troublesome.
Disclosure of Invention
The invention aims to provide a self-adaptive variable air volume ventilation cabinet, which can automatically utilize waste liquid to perform neutralization treatment, reduce the solution used in subsequent treatment and save the work of experimenters.
The technical purpose of the invention is realized by the following technical scheme:
a self-adaptive variable air volume ventilation cabinet comprises a collecting box, a test box fixedly connected to the collecting box and an exhaust pipe fixedly connected to the top of the test box and communicated with the inside of the test box, wherein a water outlet communicated with the test box is formed in the position, close to the test box, of the collecting box;
an acidic waste liquid tank and an alkaline waste liquid tank are arranged inside the collecting box, a liquid discharge pipe is fixedly connected to the position, close to the water outlet, of the collecting box, the liquid discharge pipe is communicated with the water outlet, an acidic drain pipe and an alkaline drain pipe are fixedly connected to one end, far away from the water outlet, of the liquid discharge pipe, the acidic drain pipe and the alkaline drain pipe are both communicated with the liquid discharge pipe, an acid liquid electromagnetic valve is fixedly connected to one end, close to the liquid discharge pipe, of the acidic drain pipe, an alkaline liquid electromagnetic valve is fixedly connected to one end, far away from the liquid discharge pipe, of the alkaline drain pipe, one end, far away from the liquid discharge pipe, of the acidic drain pipe is fixedly connected into the acidic waste liquid tank;
one end of the acid exhaust pipe, which is far away from the exhaust pipe, is connected to one side of the top of the alkaline waste liquid tank, the acid exhaust pipe extends into the alkaline waste liquid tank, one side of the top of the alkaline waste liquid tank, which is far away from the acid exhaust pipe, is connected with a first exhaust pipe, and the first exhaust pipe is communicated with the inside of the alkaline waste liquid tank;
one end of the alkaline exhaust pipe, which is far away from the exhaust pipe, is connected to one side of the top of the acidic waste liquid tank, the alkaline exhaust pipe extends into the acidic waste liquid tank, and one side of the top of the acidic waste liquid tank, which is far away from the alkaline exhaust pipe, is connected with a second exhaust pipe; the second exhaust pipe is communicated with the inside of the acidic waste liquid tank;
the alkali gas electromagnetic valve, the acid gas electromagnetic valve, the alkali liquid electromagnetic valve and the acid liquid electromagnetic valve are connected with a control circuit together, and the control circuit comprises a gas detection module, a gas control module, a liquid detection module and a liquid control module;
the gas detection module comprises a gas ph sensor fixedly connected in the exhaust pipe, and the gas ph sensor detects and outputs the ph value of the gas in the exhaust pipe in real time;
the gas control module receives a ph value output by the gas detection module, controls the alkali gas electromagnetic valve to be opened by electricity when the ph value output by the gas detection module is greater than 7, and controls the acid gas electromagnetic valve to be opened by electricity when the ph value output by the gas detection module is less than 7;
the liquid detection module comprises a liquid ph sensor fixedly connected in the liquid discharge pipe, and the liquid ph sensor detects and outputs the ph value of liquid in the liquid discharge pipe in real time;
the liquid control module receives a ph value output by the liquid detection module, the alkaline liquid electromagnetic valve is controlled to be powered on and opened when the ph value output by the liquid detection module is greater than 7, and the acid liquid electromagnetic valve is controlled to be powered on and opened when the ph value output by the liquid detection module is less than 7.
By adopting the scheme, when an experimenter conducts an experiment in the test box, waste gas generated in the experiment can enter the exhaust draft tube, the gas ph sensor in the exhaust draft tube can detect the ph value of the gas in the exhaust draft tube, the acid gas electromagnetic valve or the alkali gas electromagnetic valve is controlled to be opened according to the ph value of the gas, so that the gas can automatically enter the acid exhaust pipe or the alkali gas exhaust pipe, waste liquid generated in the experiment process can flow into the liquid discharge tube through the water outlet, the liquid ph sensor detects the ph value of the waste liquid, the acid liquid electromagnetic valve or the alkali liquid electromagnetic valve is controlled to be opened according to the ph value of the waste liquid, so that the waste liquid flows into the corresponding acid waste liquid box or alkaline waste liquid box, the waste liquid is precipitated in the acid waste liquid box or alkaline waste liquid box, the acid waste gas enters the alkaline waste liquid box, primary neutralization is conducted through the alkaline waste liquid, the alkaline waste gas enters the acid waste liquid box, primary neutralization is conducted through the acid waste liquid, finally, the exhaust gas after once neutralization is discharged from the fume hood and enters a subsequent device for final treatment, so that the use amount of solution in a laboratory can be effectively reduced, and the working strength of workers during subsequent treatment is reduced.
The invention is further configured to: the position of the collecting box, which is close to the exhaust pipe, is fixedly connected with an exhaust fan, the drain pipe is fixedly connected with a one-way pump, and the control circuit further comprises an equipment detection module, an exhaust control module and a drainage control module;
the equipment detection module comprises a proximity switch fixedly connected to the interior of the test box, the proximity switch detects whether an object exists in the test box in real time, and when the object appears in the test box, the proximity switch outputs a starting signal;
the exhaust control module receives a starting signal transmitted by the equipment detection module, controls the suction fan to be powered on and started after receiving the starting signal, and controls the suction fan to continuously work for a period of time after the starting signal disappears;
the drainage control module receives a starting signal transmitted by the equipment detection module, controls the one-way pump to be powered on and started after receiving the starting signal, and controls the one-way pump to continuously work for a period of time after the starting signal disappears.
By adopting the scheme, the control circuit automatically starts the suction fan and the one-way pump when an experimenter performs an experiment, and keeps the suction fan and the one-way pump working for a period of time after the experiment is finished so as to ensure that waste gas and waste liquid can be completely emptied.
The invention is further configured to: the operation mouth has been seted up to the proof box, and the proof box is close to operation mouth position department fixedly connected with transparent last baffle, goes up the baffle and covers the first half of operation mouth, and the proof box is close to last baffle position department sliding connection has transparent lower baffle, and lower baffle can cover operation mouth the latter half, and the proof box is close to baffle position department fixedly connected with gate cylinder down, the vertical setting of piston rod of gate cylinder, the piston rod fixed connection of gate cylinder is on the baffle down.
Through adopting above-mentioned scheme, the baffle reciprocates under the gate cylinder can drive, and the experimenter can control opening and shutting of operation mouth through controlling the gate cylinder.
The invention is further configured to: the control circuit also comprises an operation detection module and a gate control module;
the operation detection module comprises an infrared heat sensor fixedly connected to the outer side of the test box and close to the position of the operation port, the infrared heat sensor detects whether a person is near the operation port in real time, and when the infrared heat sensor detects that the person is near the operation port, the infrared heat sensor outputs an operation signal;
the door control module receives the operation signal output by the operation detection module, controls the door control cylinder to lift the lower baffle after receiving the operation signal, and controls the door control cylinder to lower the lower baffle after the operation signal disappears.
Through adopting above-mentioned scheme, when the experimenter was close to the proof box and operates, control circuit can automatic control down the baffle rise, and the experimenter of being convenient for operates, and the baffle can descend fast again after the experimenter leaves, can even block that the inside waste gas of proof box drifts out the proof box.
The invention is further configured to: the top of the alkaline waste liquid box is provided with a first empty groove, the top of the alkaline waste liquid box is buckled with a first buckle cover capable of covering the first empty groove, and an alkaline drain pipe, an acidic exhaust pipe and a first exhaust pipe are all fixedly connected to the first buckle cover;
a second empty groove is formed in the top of the acidic waste liquid box, a second buckle cover capable of covering the second empty groove is buckled on the top of the acidic waste liquid box, and the acidic water drainage pipe, the alkaline exhaust pipe and the second exhaust pipe are all fixedly connected to the second buckle cover;
first buckle closure and the equal fixed connection of second buckle closure are in the collecting box, and the collecting box is close to acid waste liquid case and alkaline waste liquid bottom of the case sliding connection and has the bearing board, and the bearing board can be in the collecting box vertical slip, and acid waste liquid case and alkaline waste liquid case are placed on the bearing board, and bearing board bottom fixedly connected with spring, spring other end fixed connection are in the collecting box bottom, and first buckle closure and second buckle closure can be detained respectively on alkaline waste liquid case and acid waste liquid case under the spring natural state.
Through adopting above-mentioned scheme, because experimental back, the waste liquid of acid waste liquid incasement portion and the waste liquid of alkaline waste liquid incasement portion can all need all clear up, and the user can take acid waste liquid case and alkaline waste liquid case away this moment through pressing down the bearing plate, and it is all relatively quicker to dismantle and install.
The invention is further configured to: a first isolation plate is fixedly connected to the position, corresponding to the position between the acid exhaust pipe and the first exhaust pipe, of the bottom of the first buckle cover, and the length of the first isolation plate is equal to the length of the longitudinal section in the alkaline waste liquid tank;
and a second isolation plate is fixedly connected to the position, corresponding to the position between the alkaline exhaust pipe and the second exhaust pipe, at the bottom of the second buckle cover, and the length of the second isolation plate is equal to the length of the longitudinal section in the acidic waste liquid tank.
Through adopting above-mentioned scheme, first division board and second division board can guarantee to let in the waste gas of acid waste liquid case and alkaline waste liquid case just can be discharged after passing through the waste liquid, guarantee the reuse of waste liquid.
The invention is further configured to: the bottom of the bearing plate is fixedly connected with an electromagnet, the position, close to the electromagnet, of the bottom of the bearing plate is fixedly connected with an attraction block with ferromagnetism, and the control circuit further comprises a weight detection module and a magnet control module;
the weight detection module comprises a weighing sensor fixedly connected to the bottom positions of the acid waste liquid tank and the alkaline waste liquid tank corresponding to the bearing plate, and the weighing sensor detects the weight on the bearing plate in real time and outputs a weight value;
the magnet control module receives the weight value output by the weight detection module, when the weight value received by the magnet control module exceeds a preset value, the magnet control module controls the electromagnet to lose power, and when the weight value received by the magnet control module is smaller than the preset value, the magnet control module controls the electromagnet to be powered on.
Through adopting above-mentioned scheme, the experimenter pushes down the bearing board and takes away acid waste liquid case and alkaline waste liquid case back bearing board can fix in the collecting box bottom through electro-magnet and attraction piece, treats that the experimenter places acid waste liquid case and alkaline waste liquid case on the bearing board again after, electro-magnet and attraction piece separation, and the spring is bounced the bearing board again, and the experimenter of being convenient for gets and puts acid waste liquid case and alkaline waste liquid case.
The invention is further configured to: the collecting box is provided with a taking and placing opening, a cover plate capable of covering the taking and placing opening is rotatably connected to the position, close to the taking and placing opening, of the collecting box, and a first fixing plate and a second fixing plate are fixedly connected to the position, close to the inner part of the collecting box, of the cover plate;
the first fixing plate is provided with a plurality of first clamping grooves, an alkaline solution bottle is clamped in each first clamping groove, each alkaline solution bottle is connected with an elastic first telescopic pipe, one end, away from the alkaline solution bottle, of each first telescopic pipe is fixedly connected into the alkaline waste liquid box, each first telescopic pipe is communicated with the inside of the alkaline waste liquid box, when the cover plate is buckled, each alkaline solution bottle is located above the first buckling cover, and a first electromagnetic valve is fixedly connected to each first telescopic pipe;
a plurality of second draw-in grooves have been seted up to the second fixed plate, all the joint has the acid solution bottle in every second draw-in groove, every acid solution bottle all is connected with and has elastic flexible pipe of second, every flexible pipe of second is kept away from the equal fixed connection of acid solution bottle one end in the acid waste liquid case, every flexible pipe of second all with the inside intercommunication of acid waste liquid case, when the apron lock, every acid solution bottle all is located the second buckle closure top, equal fixedly connected with second solenoid valve on the flexible pipe of every second.
By adopting the scheme, the pH value of the liquid in the acidic waste liquid tank or the alkaline waste liquid tank can be increased or decreased by the solution in the acidic solution bottle and the alkaline solution bottle during the test, so that the pH value in the acidic waste liquid tank or the alkaline waste liquid tank can be controlled.
The invention is further configured to: the control circuit also comprises a valve setting module, an alkalinity detection module, a weak alkalinity alarm module, an acidity detection module and a weak acidity alarm module;
the valve setting module receives an externally input signal and determines a first electromagnetic valve and a second electromagnetic valve as controlled valves according to the externally input signal;
the alkaline detection module comprises a first ph sensor fixedly connected to the bottom of the first buckle cover, and the first ph sensor detects and outputs a ph value in the alkaline waste liquid tank;
the weak base alarm module receives a ph value output by the alkaline detection module, and the weak base alarm module controls the opening of the controlled first electromagnetic valve when the ph value output by the alkaline detection module received by the weak base alarm module is lower than a preset value;
the acid detection module comprises a second ph sensor fixedly connected to the bottom of the second buckle cover, and the second ph sensor detects and outputs a ph value in the acid waste liquid tank;
the weak acid alarm module receives a ph value output by the acidity detection module, and the controlled second electromagnetic valve is controlled to be opened when the ph value output by the acidity detection module received by the weak acid alarm module is higher than a preset value.
By adopting the scheme, an experimenter can select the acid solution bottle and the alkaline solution bottle according to a required test before the experiment, and the control circuit can control the liquid in the acid solution bottle or the alkaline solution bottle to flow into the acid waste liquid tank or the alkaline waste liquid tank according to the pH value in the acid waste liquid tank and the alkaline waste liquid tank in the experiment process, so that the neutralization at one time can be effectively carried out.
The invention is further configured to: the first telescopic pipe is connected to the alkaline solution bottle in a threaded manner, and the second telescopic pipe is connected to the acidic solution bottle in a threaded manner.
By adopting the scheme, the acidic solution bottle and the alkaline solution bottle can be replaced, so that the solution can be conveniently supplemented or replaced according to test contents.
In conclusion, the invention has the following beneficial effects:
1. when an experimenter conducts an experiment in the test box, waste gas generated in the experiment enters the exhaust pipe, the gas ph sensor in the exhaust pipe detects the ph value of the gas in the exhaust pipe, the acid gas electromagnetic valve or the alkali gas electromagnetic valve is controlled to be opened according to the ph value of the gas, the gas automatically enters the acid exhaust pipe or the alkali gas exhaust pipe, waste liquid generated in the experiment process flows into the liquid discharge pipe through the water discharge port, the liquid ph sensor detects the ph value of the waste liquid, the acid liquid electromagnetic valve or the alkali liquid electromagnetic valve is controlled to be opened according to the ph value of the waste liquid, the waste liquid flows into the corresponding acid waste liquid box or alkali waste liquid box, the waste liquid is precipitated in the acid waste liquid box or alkali waste liquid box, the acid waste gas enters the alkali waste liquid box and is subjected to primary neutralization through the alkali waste liquid, the alkali waste gas enters the acid waste liquid box and is subjected to primary neutralization through the acid waste liquid, the waste gas after primary neutralization is finally discharged out of the fume hood and enters a subsequent device for final treatment, so that the use amount of neutralizing solution in a laboratory can be effectively reduced, and the working strength of workers in the subsequent treatment is reduced;
2. after an experimenter presses down the bearing plate and takes the acid waste liquid tank and the alkaline waste liquid tank away, the bearing plate is fixed at the bottom of the collecting box through the electromagnet and the attraction block, after the experimenter puts the acid waste liquid tank and the alkaline waste liquid tank on the bearing plate again, the electromagnet is separated from the attraction block, and the bearing plate is bounced up by the spring, so that the experimenter can conveniently take and place the acid waste liquid tank and the alkaline waste liquid tank;
3. the experimenter can select acid solution bottle and alkaline solution bottle according to the experiment that needs were gone on before experimental, and control circuit can come the inside liquid of control acid solution bottle or alkaline solution bottle to flow into acid waste liquid case or alkaline waste liquid incasement according to the inside ph value of acid waste liquid case and alkaline waste liquid incasement in the experimentation, guarantees that once neutralization can effectively go on.
Drawings
FIG. 1 is a schematic view of the overall structure of the embodiment;
FIG. 2 is a schematic diagram of an embodiment highlighting a gated cylinder;
FIG. 3 is a sectional view showing the internal structure of the highlighted collection box and test chamber in the embodiment;
FIG. 4 is an exploded view of the embodiment with the access opening and cover plate highlighted;
FIG. 5 is a schematic view showing the alkaline waste tank and the acidic waste tank in the examples;
FIG. 6 is a sectional view of a protruded collection box, an alkaline waste liquid box and an acidic waste liquid box in the example;
FIG. 7 is a block diagram of a highlight control circuit in the embodiment.
In the figure, 1, a collecting box; 11. a water outlet; 111. a liquid discharge pipe; 112. a one-way pump; 12. an acid drain pipe; 121. an acid liquor electromagnetic valve; 13. an alkaline drain pipe; 131. an alkali liquor electromagnetic valve; 14. an acidic waste liquid tank; 141. a second buckle cover; 1411. a second exhaust pipe; 1412. a second separator plate; 142. a second empty slot; 15. an alkaline waste liquor tank; 151. a first buckle cover; 1511. a first exhaust pipe; 1512. a first separator plate; 152. a first empty slot; 16. a support plate; 161. a spring; 162. an electromagnet; 163. an attraction block; 17. a taking and placing port; 171. a cover plate; 18. a first fixing plate; 181. a first card slot; 182. an alkaline solution bottle; 183. a first telescopic tube; 1831. a first electromagnetic valve, 19 and a second fixing plate; 191. a second card slot; 192. an acidic solution bottle; 193. a second telescopic tube; 1931. a second solenoid valve; 2. a test chamber; 21. an exhaust pipe; 211. an exhaust fan; 22. an acidic exhaust pipe; 221. a sour gas solenoid valve; 23. an alkaline exhaust pipe; 231. an alkaline gas solenoid valve; 24. an operation port; 241. an upper baffle plate; 242. a lower baffle plate; 2421. a gated cylinder; 3. a gas detection module; 31. a gas control module; 32. a gas ph sensor; 4. a liquid detection module; 41. a liquid control module; 42. a liquid ph sensor; 5. an equipment detection module; 51. an exhaust control module; 52. a drainage control module; 53. a proximity switch; 6. an operation detection module; 61. a gate control module; 62. an infrared heat sensor; 7. a weight detection module; 71. a magnet control module; 72. a weighing sensor; 8. a valve setting module; 81. an alkalinity detection module; 811. a first ph sensor; 82. an alkaline alarm module; 83. an acidity detection module; 831. a second ph sensor; 84. and an acidity alarm module.
Detailed Description
Example (b): a self-adaptive variable air volume fume hood, as shown in figure 1 and figure 2, comprises a collecting box 1 and a test box 2 fixedly connected to the collecting box 1. The test box 2 is provided with an operation opening 24, a transparent upper baffle 241 is fixedly connected to the position of the test box 2 close to the operation opening 24, and the upper baffle 241 covers the upper half part of the operation opening 24. A transparent lower baffle 242 is slidably connected to the test chamber 2 near the upper baffle 241, and the lower baffle 242 can cover the lower half of the operation opening 24. A gated cylinder 2421 is fixedly connected to the position, close to the lower baffle 242, of the test box 2, a piston rod of the gated cylinder 2421 is vertically arranged, and a piston rod of the gated cylinder 2421 is fixedly connected to the lower baffle 242. Experimenters can be experimental in proof box 2 through operation mouth 24, and baffle 242 reciprocated under gate cylinder 2421 can drive, and experimenters can control opening and shutting of operation mouth 24 through control gate cylinder 2421.
As shown in fig. 1 and 3, an exhaust pipe 21 is fixedly connected to the top of the test chamber 2, and the exhaust pipe 21 is communicated with the inside of the test chamber 2. An exhaust fan 211 is fixedly connected to the collection box 1 near the exhaust pipe 21. The exhaust fan 211 draws the exhaust air inside the test chamber 2 into the exhaust duct 21. One end of the exhaust pipe 21, which is far away from the test box 2, is fixedly connected with an acidic exhaust pipe 22 and an alkaline exhaust pipe 23, and both the acidic exhaust pipe 22 and the alkaline exhaust pipe 23 are communicated with the exhaust pipe 21. An acid gas electromagnetic valve 221 is fixedly connected to one end of the acid exhaust pipe 22 close to the exhaust pipe 21, and an alkali gas electromagnetic valve 231 is fixedly connected to one end of the alkali exhaust pipe 23 close to the exhaust pipe 21.
As shown in fig. 1 and 3, a water outlet 11 communicated with the test chamber 2 is formed in the position of the collection box 1 close to the test chamber 2, a drain pipe 111 is fixedly connected to the position of the collection box 1 close to the water outlet 11, and the drain pipe 111 is communicated with the water outlet 11. One end of the drain pipe 111, which is far away from the drain opening 11, is fixedly connected with an acidic drain pipe 12 and an alkaline drain pipe 13, and both the acidic drain pipe 12 and the alkaline drain pipe 13 are communicated with the drain pipe 111. An acid liquor electromagnetic valve 121 is fixedly connected to one end of the acidic drain pipe 12 close to the liquid discharge pipe 111, and an alkali liquor electromagnetic valve 131 is fixedly connected to one end of the alkaline drain pipe 13 close to the liquid discharge pipe 111. The collection box 1 is internally provided with an acidic waste liquid box 14 and an alkaline waste liquid box 15. The end of the acid drain pipe 12 far away from the liquid discharge pipe 111 is fixedly connected to the inside of the acid waste liquid tank 14, and the acid drain pipe 12 is communicated with the inside of the acid waste liquid tank 14. One end of the alkaline drain pipe 13, which is far away from the drain pipe 111, is fixedly connected in the alkaline waste liquid tank 15, and the alkaline drain pipe 13 is communicated with the inside of the alkaline waste liquid tank 15. The waste liquid generated during the test flows into the drain pipe 111 through the drain port 11, and the waste liquid flows into the acidic waste liquid tank 14 or the alkaline waste liquid tank 15 through the alkaline drain pipe 13 or the acidic drain pipe 12.
As shown in FIG. 4, the collection box 1 is opened with a pick-and-place port 17 for the alkaline waste liquid tank 15 and the acidic waste liquid tank 14 to pass through, and the collection box 1 is rotatably connected with a cover plate 171 capable of covering the pick-and-place port 17 at a position close to the pick-and-place port 17
As shown in fig. 5 and 6, a first empty groove 152 is formed at the top of the alkaline waste liquid tank 15, and a first buckle cover 151 capable of covering the first empty groove 152 is buckled at the top of the alkaline waste liquid tank 15. The alkaline drain pipe 13 and the acidic exhaust pipe 22 are both fixedly connected to the first buckle cover 151, and one end of the acidic exhaust pipe 22 is arranged to penetrate into the alkaline waste liquid tank 15; fixedly connected with first exhaust pipe 1511 on first buckle lid 151, first exhaust pipe 1511 and the inside intercommunication of alkaline waste liquid case 15.
As shown in fig. 5 and 6, a second empty groove 142 is formed at the top of the acidic waste liquid tank 14, and a second cover 141 capable of covering the second empty groove 142 is fastened to the top of the acidic waste liquid tank 14. The acid drain pipe 12 and the alkaline exhaust pipe 23 are both fixedly connected to the second buckle cover 141, and one end of the alkaline exhaust pipe 23 is arranged to penetrate into the acid waste liquid tank 14; a second exhaust pipe 1411 is fixedly connected to the second buckle cover 141, and the second exhaust pipe 1411 is communicated with the inside of the acidic waste liquid tank 14. The first buckle cover 151 and the second buckle cover 141 are both fixedly connected in the collecting box 1.
As shown in fig. 5 and 6, a first isolation plate 1512 is fixedly connected to a position at the bottom of the first buckle cover 151 corresponding to a position between the acidic exhaust pipe 22 and the first exhaust pipe 1511, and a length of the first isolation plate 1512 is equal to a length of a longitudinal section inside the alkaline waste liquid tank 15. A second partition plate 1412 is fixedly connected to the bottom of the second buckle cover 141 at a position corresponding to the position between the alkaline exhaust pipe 23 and the second exhaust pipe 1411, and the length of the second partition plate 1412 is equal to the length of the longitudinal section inside the acid waste liquid tank 14. The first partition 1512 and the second partition 1412 ensure that the waste gas introduced into the acidic waste liquid tank 14 and the alkaline waste liquid tank 15 is discharged after passing through the waste liquid.
As shown in fig. 5 and 6, the cover plate 171 is fixedly connected with a first fixing plate 18 and a second fixing plate 19 at positions close to the inside of the collecting chamber 1. A plurality of first draw-in grooves 181 have been seted up to first fixed plate 18, all block in every first draw-in groove 181 has alkaline solution bottle 182, and every alkaline solution bottle 182 all threaded connection has elastic first flexible pipe 183, and every flexible pipe 183 is kept away from alkaline solution bottle 182 one end and is all fixed connection in alkaline waste liquid case 15, and every flexible pipe 183 all communicates with alkaline waste liquid case 15 is inside. When the cover plate 171 is fastened, each of the alkaline solution bottles 182 is positioned above the first fastening cover 151, and a first solenoid valve 1831 is fixedly connected to each of the first extension pipes 183.
As shown in fig. 5 and 6, the second fixing plate 19 is provided with a plurality of second locking grooves 191, each second locking groove 191 is internally locked with an acidic solution bottle 192, each acidic solution bottle 192 is in threaded connection with an elastic second telescopic pipe 193, one end of each second telescopic pipe 193, which is far away from the acidic solution bottle 192, is fixedly connected to the acidic waste liquid tank 14, each second telescopic pipe 193 is communicated with the inside of the acidic waste liquid tank 14, when the cover plate 171 is locked, each acidic solution bottle 192 is located above the second buckle cover 141, and each second telescopic pipe 193 is fixedly connected with a second electromagnetic valve 1931.
As shown in FIGS. 5 and 6, a support plate 16 is slidably connected to the bottom of the collection box 1 near the acid waste liquid box 14 and the alkaline waste liquid box 15, and the support plate 16 can vertically slide in the collection box 1. The acid waste tank 14 and the alkaline waste tank 15 are placed on a support plate 16. The bottom of the supporting plate 16 is fixedly connected with a spring 161, the other end of the spring 161 is fixedly connected with the bottom of the collecting box 1, and the first buckle cover 151 and the second buckle cover 141 can be buckled on the acid waste liquid box 14 and the alkaline waste liquid box 15 respectively under the natural state of the spring 161.
As shown in fig. 7, the fume hood is provided with a control circuit, which includes a gas detection module 3, a gas control module 31, a liquid detection module 4, a liquid control module 41, an equipment detection module 5, an exhaust control module 51, a drain control module 52, an operation detection module 6, a gate control module 61, a weight detection module 7, a magnet control module 71, a valve setting module 8, an alkaline detection module 81, a weak base alarm module, an acidic detection module 83, and a weak acid alarm module.
As shown in fig. 6 and 7, the gas detection module 3 includes a gas ph sensor 32 fixedly connected in the exhaust pipe 21, and the gas ph sensor 32 detects and outputs a ph value of the gas in the exhaust pipe 21 in real time. The gas control module 31 receives the ph value output by the gas detection module 3, controls the alkali gas solenoid valve 231 to be opened by electricity when the ph value output by the gas detection module 3 is greater than 7, and controls the acid gas solenoid valve 221 to be opened by electricity when the ph value output by the gas detection module 3 is less than 7.
As shown in fig. 6 and 7, the liquid detection module 4 includes a liquid ph sensor 42 fixedly connected to the inside of the drain pipe 111, and the liquid ph sensor 42 detects and outputs a ph value of the liquid inside the drain pipe 111 in real time. The liquid control module 41 receives a ph value output by the liquid detection module 4, controls the lye electromagnetic valve 131 to be powered on and opened when the ph value output by the liquid detection module 4 is greater than 7, and controls the acid electromagnetic valve 121 to be powered on and opened when the ph value output by the liquid detection module 4 is less than 7.
When an experimenter conducts a test in the test box 2, waste gas generated in the test can enter the exhaust pipe 21, the gas ph sensor 32 in the exhaust pipe 21 can detect the ph value of the gas in the exhaust pipe 21, and the acid gas electromagnetic valve 221 or the alkali gas electromagnetic valve 231 is controlled to be opened according to the ph value of the gas, so that the gas can automatically enter the acid exhaust pipe 22 or the alkali gas exhaust pipe. The waste liquid generated in the test process flows into the drain pipe 111 through the drain port 11, the liquid ph sensor 42 detects the ph value of the waste liquid, and controls the acid liquid electromagnetic valve 121 or the alkali liquid electromagnetic valve 131 to be opened according to the ph value of the waste liquid, so that the waste liquid flows into the corresponding acidic waste liquid tank 14 or the corresponding alkaline waste liquid tank 15. The waste liquid is precipitated in the acid waste liquid tank 14 or the alkaline waste liquid tank 15. The acidic waste gas enters the alkaline waste liquid tank 15, and is subjected to primary neutralization by the alkaline waste liquid. The alkaline waste gas enters the acidic waste liquid tank 14, and is neutralized once by the acidic waste liquid. And finally, the waste gas after primary neutralization is discharged out of the fume hood and enters a subsequent device for final treatment.
As shown in fig. 6 and 7, the equipment detection module 5 includes a proximity switch 53 fixedly connected to the inside of the test chamber 2, the proximity switch 53 detects whether an object exists inside the test chamber 2 in real time, and when an object exists inside the test chamber 2, the proximity switch 53 outputs an activation signal. The exhaust control module 51 receives a start signal from the equipment detection module 5, controls the pumping fan 211 to be powered on and started after the exhaust control module 51 receives the start signal, and controls the pumping fan 211 to continue to work for a period of time after the start signal disappears. The drainage control module 52 receives the start signal from the equipment detection module 5, controls the one-way pump 112 to be powered on and started after the drainage control module 52 receives the start signal, and controls the one-way pump 112 to continue to work for a period of time after the start signal disappears. The control circuit automatically starts the suction fan 211 and the one-way pump 112 when an experimenter conducts an experiment, and keeps the suction fan 211 and the one-way pump 112 working for a period of time when the experiment is finished so as to ensure that waste gas and waste liquid can be completely emptied.
As shown in fig. 1 and 7, operation detection module 6 includes an infrared heat sensor 62 fixedly attached to the outside of test chamber 2 at a position near operation port 24. The infrared heat sensor 62 detects the presence or absence of a person near the operation port 24 in real time, and when the infrared heat sensor 62 detects the presence of a person near the operation port 24, the infrared heat sensor 62 outputs an operation signal. The gate control module 61 receives the operation signal output by the operation detection module 6, controls the gate control cylinder 2421 to lift the lower baffle 242 when the operation signal is received by the gate control module 61, and controls the gate control cylinder 2421 to lower the lower baffle when the operation signal disappears. When the experimenter is close to the test box 2 to operate, the control circuit can automatically control the lower baffle 242 to rise, and the lower baffle 242 can also fall quickly after the experimenter leaves.
As shown in fig. 6 and 7, an electromagnet 162 is fixedly connected to the bottom of the support plate 16, and a ferromagnetic attraction block 163 is fixedly connected to the bottom of the support plate at a position close to the electromagnet 162. The weight detection module 7 includes a load cell 72 fixedly attached to the support plate 16 at a location corresponding to the bottom of the acidic waste tank 14 and the alkaline waste tank 15. Load cell 72 senses the weight on support plate 16 in real time and outputs a weight value. The magnet control module 71 receives the weight value output by the weight detection module 7, and when the weight value received by the magnet control module 71 exceeds a preset value, the magnet control module 71 controls the electromagnet 162 to lose power. When the weight value received by the magnet control module 71 is smaller than the preset value, the magnet control module 71 controls the electromagnet 162 to be powered on. After the experimenter presses down the supporting plate 16 and takes the acid waste liquid tank 14 and the alkaline waste liquid tank 15 away, the supporting plate 16 is fixed at the bottom of the collecting box 1 through the electromagnet 162 and the attraction block 163, after the experimenter puts the acid waste liquid tank 14 and the alkaline waste liquid tank 15 on the supporting plate 16 again, the electromagnet 162 is separated from the attraction block 163, and the spring 161 bounces the supporting plate 16 again.
As shown in fig. 6 and 7, the valve setting module 8 receives an externally input signal and determines a first solenoid valve 1831 and a second solenoid valve 1931 as controlled valves according to the externally input signal. The alkaline detection module 81 includes a first ph sensor 811 fixedly connected to the bottom of the first buckle cover 151, and the first ph sensor 811 detects and outputs a ph value inside the alkaline waste liquid tank 15. The acidity detection module 83 includes a second ph sensor 831 fixedly connected to the bottom of the second buckle cover 141, and the second ph sensor 831 detects and outputs a ph value inside the acidic waste liquid tank 14.
As shown in fig. 7, the weak base alarm module receives a ph value output by the alkaline detection module 81, and controls the controlled first solenoid valve 1831 to open when the ph value output by the alkaline detection module 81 received by the weak base alarm module is lower than a preset value. The weak acid alarm module receives a ph value output by the acidity detection module 83, and the controlled second electromagnetic valve 1931 is controlled to be opened when the ph value output by the acidity detection module 83 received by the weak acid alarm module is higher than a preset value.
Experimenters can select acid solution bottle 192 and alkaline solution bottle 182 according to the experiment that needs to go on before the experiment, and control circuit can control the liquid of acid solution bottle 192 or the inside of alkaline solution bottle 182 according to the inside ph value of acid waste liquid case 14 and alkaline waste liquid case 15 and flow into acid waste liquid case 14 or alkaline waste liquid case 15 in the experimentation, guarantees that neutralization can effectively go on once.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The utility model provides a self-adaptation variable air volume fume chamber, includes collecting box (1), test box (2) and fixed connection on collecting box (1) exhaust column (21) at test box (2) top and with the inside intercommunication of test box (2), and collecting box (1) are close to test box (2) position department and offer outlet (11) with test box (2) intercommunication, its characterized in that: one end, far away from the test box (2), of the exhaust pipe (21) is fixedly connected with an acidic exhaust pipe (22) and an alkaline exhaust pipe (23), the acidic exhaust pipe (22) and the alkaline exhaust pipe (23) are both communicated with the exhaust pipe (21), one end, close to the exhaust pipe (21), of the acidic exhaust pipe (22) is fixedly connected with an acid gas electromagnetic valve (221), and one end, close to the exhaust pipe (21), of the alkaline exhaust pipe (23) is fixedly connected with an alkaline gas electromagnetic valve (231);
an acidic waste liquid box (14) and an alkaline waste liquid box (15) are arranged inside the collection box (1), a liquid discharge pipe (111) is fixedly connected at the position, close to the water outlet (11), of the collection box (1), the liquid discharge pipe (111) is communicated with the water outlet (11), an acidic drain pipe (12) and an alkaline drain pipe (13) are fixedly connected at one end, far away from the water outlet (11), of the liquid discharge pipe (111), the acidic drain pipe (12) and the alkaline drain pipe (13) are both communicated with the liquid discharge pipe (111), an acid liquid electromagnetic valve (121) is fixedly connected at one end, close to the liquid discharge pipe (111), of the acidic drain pipe (12), an alkaline liquid electromagnetic valve (131) is fixedly connected at one end, far away from the liquid discharge pipe (111), of the acidic drain pipe (12) is fixedly connected in the acidic waste liquid box (14), and the acidic drain pipe (12) is communicated, one end of the alkaline drain pipe (13) far away from the liquid discharge pipe (111) is fixedly connected into the alkaline waste liquid tank (15), and the alkaline drain pipe (13) is communicated with the inside of the alkaline waste liquid tank (15);
one end of the acid exhaust pipe (22), which is far away from the exhaust pipe (21), is connected to one side of the top of the alkaline waste liquid tank (15), the acid exhaust pipe (22) extends into the alkaline waste liquid tank (15), one side of the top of the alkaline waste liquid tank (15), which is far away from the acid exhaust pipe (22), is connected with a first exhaust pipe, and the first exhaust pipe is communicated with the inside of the alkaline waste liquid tank (15);
one end of the alkaline exhaust pipe (23), which is far away from the exhaust pipe (21), is connected to one side of the top of the acidic waste liquid tank (14), the alkaline exhaust pipe (23) extends into the acidic waste liquid tank (14), and one side of the top of the acidic waste liquid tank (14), which is far away from the alkaline exhaust pipe (23), is connected with a second exhaust pipe; the second extraction pipe is communicated with the inside of the acidic waste liquid tank (14);
the alkali gas electromagnetic valve (231), the acid gas electromagnetic valve (221), the alkali liquid electromagnetic valve (131) and the acid liquid electromagnetic valve (121) are jointly connected with a control circuit, and the control circuit comprises a gas detection module (3), a gas control module (31), a liquid detection module (4) and a liquid control module (41);
the gas detection module (3) comprises a gas ph sensor (32) fixedly connected in the exhaust pipe (21), and the gas ph sensor (32) detects and outputs a ph value of gas in the exhaust pipe (21) in real time;
the gas control module (31) receives a ph value output by the gas detection module (3), when the ph value output by the gas detection module (3) is greater than 7, the alkali gas solenoid valve (231) is controlled to be opened by electricity, and when the ph value output by the gas detection module (3) is less than 7, the acid gas solenoid valve (221) is controlled to be opened by electricity;
the liquid detection module (4) comprises a liquid ph sensor (42) fixedly connected in the liquid discharge pipe (111), and the liquid ph sensor (42) detects and outputs a ph value of liquid in the liquid discharge pipe (111) in real time;
the liquid control module (41) receives a ph value output by the liquid detection module (4), when the ph value output by the liquid detection module (4) is larger than 7, the lye electromagnetic valve (131) is controlled to be powered on and opened, and when the ph value output by the liquid detection module (4) is smaller than 7, the acid electromagnetic valve (121) is controlled to be powered on and opened.
2. The self-adaptive variable air volume ventilation cabinet according to claim 1, characterized in that: an exhaust fan (211) is fixedly connected to the position, close to the exhaust pipe (21), of the collection box (1), a one-way pump (112) is fixedly connected to the liquid discharge pipe (111), and the control circuit further comprises an equipment detection module (5), an exhaust control module (51) and a drainage control module (52);
the equipment detection module (5) comprises a proximity switch (53) fixedly connected to the interior of the test box (2), the proximity switch (53) detects whether an object exists in the test box (2) in real time, and when the object appears in the test box (2), the proximity switch (53) outputs a starting signal;
the exhaust control module (51) receives a starting signal transmitted by the equipment detection module (5), controls the electric power of the exhaust fan (211) to be started after the exhaust control module (51) receives the starting signal, and controls the exhaust fan (211) to continuously work for a period of time after the starting signal disappears;
the drainage control module (52) receives a starting signal transmitted by the equipment detection module (5), controls the one-way pump (112) to be powered on and started after the drainage control module (52) receives the starting signal, and controls the one-way pump (112) to continuously work for a period of time after the starting signal disappears.
3. An adaptive variable air volume fume hood according to claim 2, characterized in that: operation mouth (24) have been seted up in proof box (2), proof box (2) are close to operation mouth (24) position department fixedly connected with transparent overhead gage (241), overhead gage (241) cover operation mouth (24) upper half, proof box (2) are close to overhead gage (241) position department sliding connection and have transparent lower baffle (242), baffle (242) can cover operation mouth (24) the latter half down, proof box (2) are close to baffle (242) position department fixedly connected with gate cylinder (2421) down, the vertical setting of piston rod of gate cylinder (2421), the piston rod fixed connection of gate cylinder (2421) is on baffle (242) down.
4. An adaptive variable air volume fume hood according to claim 3, characterized in that: the control circuit further comprises an operation detection module (6) and a gate control module (61);
the operation detection module (6) comprises an infrared heat sensor (62) fixedly connected to the outer side of the test box (2) and close to the position of the operation port (24), the infrared heat sensor (62) detects whether a person is near the operation port (24) in real time, and when the infrared heat sensor (62) detects that the person is near the operation port (24), the infrared heat sensor (62) outputs an operation signal;
the gate control module (61) receives the operation signal output by the operation detection module (6), when the gate control module (61) receives the operation signal, the gate control cylinder (2421) is controlled to lift the lower baffle (242), and when the operation signal disappears, the gate control module (61) controls the gate control cylinder (2421) to lower the lower baffle.
5. The self-adaptive variable air volume ventilation cabinet according to claim 1, characterized in that: the top of the alkaline waste liquid tank (15) is provided with a first empty groove (152), the top of the alkaline waste liquid tank (15) is buckled with a first buckle cover (151) capable of covering the first empty groove (152), and the alkaline drain pipe (13), the acidic exhaust pipe (22) and the first exhaust pipe (1511) are all fixedly connected to the first buckle cover (151);
a second empty groove (142) is formed in the top of the acidic waste liquid tank (14), a second buckle cover (141) capable of covering the second empty groove (142) is buckled on the top of the acidic waste liquid tank (14), and the acidic drain pipe (12), the alkaline exhaust pipe (23) and the second exhaust pipe (1411) are fixedly connected to the second buckle cover (141);
first buckle closure (151) and the equal fixed connection of second buckle closure (141) are in collecting box (1), collecting box (1) is close to acid waste liquid case (14) and alkaline waste liquid case (15) bottom sliding connection has bearing board (16), bearing board (16) can be in collecting box (1) vertical sliding, acid waste liquid case (14) and alkaline waste liquid case (15) are placed on bearing board (16), bearing board (16) bottom fixed connection has spring (161), spring (161) other end fixed connection is in collecting box (1) bottom, first buckle closure (151) and second buckle closure (141) can be detained respectively on alkaline waste liquid case (15) and acid waste liquid case (14) under spring (161) natural state.
6. An adaptive variable air volume ventilation cabinet according to claim 5, characterized in that: a first isolation plate (1512) is fixedly connected to the position, corresponding to the position between the acidic exhaust pipe (22) and the first exhaust pipe (1511), at the bottom of the first buckle cover (151), and the length of the first isolation plate (1512) is equal to the length of the longitudinal section inside the alkaline waste liquid tank (15);
a second partition plate (1412) is fixedly connected to the position, corresponding to the position between the alkaline exhaust pipe (23) and the second exhaust pipe (1411), at the bottom of the second buckle cover (141), and the length of the second partition plate (1412) is equal to the length of the longitudinal section inside the acidic waste liquid tank (14).
7. An adaptive variable air volume ventilation cabinet according to claim 5, characterized in that: the bottom of the bearing plate (16) is fixedly connected with an electromagnet (162), the position, close to the electromagnet (162), of the bottom of the bearing plate (16) is fixedly connected with an attraction block (163) with ferromagnetism, and the control circuit further comprises a weight detection module (7) and a magnet control module (71);
the weight detection module (7) comprises a weighing sensor (72) fixedly connected to the bottom positions of the supporting plate (16) corresponding to the acid waste liquid tank (14) and the alkaline waste liquid tank (15), and the weighing sensor (72) detects the weight on the supporting plate (16) in real time and outputs a weight value;
the weight value that weight detection module (7) output is received in magnet control module (71), and after the weight value that magnet control module (71) received exceeded the default, magnet control module (71) control electro-magnet (162) lost electricity, and after the weight value that magnet control module (71) received was less than the default, magnet control module (71) control electro-magnet (162) got electricity.
8. An adaptive variable air volume ventilation cabinet according to claim 5, characterized in that: the collecting box (1) is provided with a taking and placing opening (17), a cover plate (171) capable of covering the taking and placing opening (17) is rotatably connected to the position, close to the taking and placing opening (17), of the collecting box (1), and a first fixing plate (18) and a second fixing plate (19) are fixedly connected to the position, close to the inner part of the collecting box (1), of the cover plate (171);
a plurality of first clamping grooves (181) are formed in the first fixing plate (18), an alkaline solution bottle (182) is clamped in each first clamping groove (181), each alkaline solution bottle (182) is connected with an elastic first telescopic pipe (183), one end, away from the alkaline solution bottle (182), of each first telescopic pipe (183) is fixedly connected into the alkaline waste liquid tank (15), each first telescopic pipe (183) is communicated with the inside of the alkaline waste liquid tank (15), when the cover plate (171) is buckled, each alkaline solution bottle (182) is located above the first buckling cover (151), and a first electromagnetic valve (1831) is fixedly connected to each first telescopic pipe (183);
a plurality of second draw-in grooves (191) have been seted up in second fixed plate (19), all the joint has acidic solution bottle (192) in every second draw-in groove (191), every acidic solution bottle (192) all are connected with flexible second pipe (193) that have elasticity, every flexible pipe (193) of second is kept away from acidic solution bottle (192) one end and is all fixed connection in acidic waste liquid case (14), every flexible pipe (193) of second all with acidic waste liquid case (14) inside intercommunication, when apron (171) lock, every acidic solution bottle (192) all are located second buckle closure (141) top, all fixedly connected with second solenoid valve (1931) on every flexible pipe (193) of second.
9. An adaptive variable air volume ventilation cabinet according to claim 8, characterized in that: the control circuit also comprises a valve setting module (8), an alkaline detection module (81), a weak alkaline alarm module, an acidic detection module (83) and a weak acid alarm module;
the valve setting module (8) receives signals input from the outside and determines a first solenoid valve (1831) and a second solenoid valve (1931) as controlled valves according to the signals input from the outside;
the alkaline detection module (81) comprises a first ph sensor (811) fixedly connected to the bottom of the first buckle cover (151), and the first ph sensor (811) detects and outputs a ph value inside the alkaline waste liquid tank (15);
the weak base alarm module receives a ph value output by the alkaline detection module (81), and the first controlled electromagnetic valve (1831) is controlled to be opened when the ph value output by the alkaline detection module (81) received by the weak base alarm module is lower than a preset value;
the acidity detection module (83) comprises a second ph sensor (831) fixedly connected to the bottom of the second buckle cover (141), and the second ph sensor (831) detects and outputs a ph value in the acidic waste liquid tank (14);
the weak acid alarm module receives a ph value output by the acidity detection module (83), and the controlled second electromagnetic valve (1931) is controlled to be opened when the ph value output by the acidity detection module (83) received by the weak acid alarm module is higher than a preset value.
10. An adaptive variable air volume ventilation cabinet according to claim 8, characterized in that: the first extension tube (183) is screwed to the alkaline solution bottle (182), and the second extension tube (193) is screwed to the acidic solution bottle (192).
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| JP3006848U (en) * | 1994-07-18 | 1995-01-31 | 四電エンジニアリング株式会社 | Blower |
| CN105311911A (en) * | 2015-11-11 | 2016-02-10 | 华北电力大学（保定） | Experimental ventilation cabinet filtering device |
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